Gas chamber for oil switches



Sept. 20 1932.

Filed Fe 9' 1 1 J OJ'IZ H i INVENTOR;

I Mior atented Sept. 20, 1932 FRANZ nous'r, or PILSEN, CZECHOSLOVAKIA GAS CHAMBER FOR OIL SWITCHES application file-(l February 9, 1931,Seria1 No. 514,449, and in Czechoslovakia February 10, 1930.

This invention relates to a gas chamber for oil switches. The escape of gas from oil switches after each circuit breaking operation lays an important part in the complete switc ing process, especially in the case of a short-circuit, because unless adequate provision is made for the unchecked escape of the gases generated very high pressures can be developed which are capable, at times, of bursting the oil switch tank.

Large openings for the escape of the gases, as hitherto provided, are attended by the drawback that it is impossible to prevent the ejection of oil from the tank, making frequent replenishment of oil necessary, and causing the entire vicinit of the oil switch to be soiled. Small openings, which restrict the quantity of oil ejected, are on the other hand a source of danger to the oil switch itself, in view of the high pressures which can then occur in the latter.

These drawbacks are obviated by the device according to the present invention which employs an outflow duct of sufliciently large cross-section, and at the same time prevents the escape of oil.

A constructional example of a device of this type is illustrated in the accompanying drawing, in which Fig. 1 is a sectional view of the upper portion of an oil switch tank showing the gas chamber according to the present invention.

Fig. 2 is a plan elevation of the lid of an oil switch tank embodyin the gas chamber.

The essential feature 0 this device is that the apertures for the escape of gas are disposed in walls of the gas chamber which are parallel to the direction of the movement of the oil following circuit breaking.

Referring to the drawing, there is provided in the lid 1 of the oil switch 2, and preferably in the middle thereof, a chamber 3 havin a series of apertures 4 in its side wall. t the bottom this chamber 3 is completely closed, and at the top it merges in the outflow duct 5. On the actuation of the switch for the breaking of the circuit the surface of the oil in the tank is suddenly raised and strikes against the lid 1. Since the perforated wall of the chamber 3 is no u parallel to the direction of the movement of the oil only a negligible quantity of the oil passes into the interior of the chamber, in View of the short time during which the oil is retained at this level by the gases.

The oil spurts through the openings 4 into the interior of the chamber 3 and drives the air impregnated with oil in front of it. In consequence, however, of the change of direction in the outflow duct the specifically heavier particles of oil become separated from the escaping air or gases and remain within the gas chamber, while the air or gases on the other hand pass out of the chamber, whereby the outflow duct can be of very large cross-section. In this manner the pressure created in the oil switch by the act of breaking the circuit is relieved, without the slightest loss of oil being incurred.

I claim 1. In an oil switch comprising an airtight container, a chamber forming an integral part of said container and projecting from the center of the top of said container into the interior thereof, a lead-ofli' conduit connected to said chamber, the latter having a closed bottom and being provided with lateral openings to produce communication between the container and the chamber, said openings being disposed short of the lower edge of the said chamber and spaced from the top of the container; said openings allowing the gases formed in said container to readily escape through the chamber into the conduit, whereby the part of said chamber below the said openings forms a receptacle for receiving the oil forced by the escaping gas through said openings and whereby the spaced position of said openings from the container top avoids such oil from reaching the lead-ofi' conduit.

2. A device as claimed in claim 1, in which a part of the container top forms a wall portion of the lead-off conduit which communicates with atmosphere, said conduit extending radially from the center of the top to and over the periphery of the container and having its orifice directed downwardly.

In testimony whereof I afiix my signature.

FRANZ HOUST. 

